Struts 2 validation chaining

Hi
I am trying to use actionchaining in struts2 and am stuck. Any help would
be really appreciated.

Scenario - I have a page that shows a list of records and also has a form
to add a new record. When user clicks on add I call addAction and chain it
to list action to go back to list page again showing the newly added
record.

I have 1 issues/questions -
a) My validation does not work if I chainactions. If I don't enter
anything in add textbox and click on Add then I get a html 404 error. If I
route to list.jsp instead of chaning to list action then I see validation
messages. But I really need to show list on that page as well. So I can
not forward to the jsp.